Implants are seen in 1/3 of patients with serous borderline tumors, mortality is 25%; some may arise from peritoneal mesothelium; destructive invasion and cytologic atypia are associated with disease progression

May regress spontaneously leaving psammoma bodies behind

Criteria:

Ovarian carcinoma if multiple peritoneal nodules with features of ovarian serous borderline tumor or carcinoma and some minimal ovarian involvement

Extraovarian serous carcinoma or papillary tumor of peritoneum if no ovarian involvement

Criteria for implants associated with primary benign or borderline tumor:

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